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https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
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0335893559
This element outputs the same format expected by tttocea608 in json mode. It notably differs from cea608tott in that it only uses libcaption's low-level API, as it needs to maintain its own view of the current state of the screen, and make fine-grained decisions as to when to output data and how to timestamp it. It covers a large portion of the 608 spec, with the exception of a few features that probably haven't ever seen widespread usage, those are listed in a TODO list at the top. It has been tested with a reference file produced by CEA and covers all the features it demonstrates. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/480>
91 lines
2.4 KiB
Rust
91 lines
2.4 KiB
Rust
// Copyright (C) 2021 Mathieu Duponchelle <mathieu@centricular.com>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the
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// Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
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// Boston, MA 02110-1335, USA.
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use serde::{Deserialize, Serialize};
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#[derive(
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Serialize, Deserialize, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy, glib::GEnum,
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)]
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#[repr(u32)]
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#[genum(type_name = "GstTtToCea608Mode")]
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pub enum Cea608Mode {
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PopOn,
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PaintOn,
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RollUp2,
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RollUp3,
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RollUp4,
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}
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#[derive(Clone, Copy, Serialize, Deserialize, Debug, PartialEq)]
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pub enum TextStyle {
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White,
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Green,
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Blue,
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Cyan,
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Red,
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Yellow,
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Magenta,
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ItalicWhite,
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}
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impl From<u32> for TextStyle {
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fn from(val: u32) -> Self {
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match val {
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0 => TextStyle::White,
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1 => TextStyle::Green,
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2 => TextStyle::Blue,
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3 => TextStyle::Cyan,
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4 => TextStyle::Red,
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5 => TextStyle::Yellow,
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6 => TextStyle::Magenta,
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7 => TextStyle::ItalicWhite,
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_ => TextStyle::White,
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}
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}
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}
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// TODO allow indenting chunks
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#[derive(Serialize, Deserialize, Debug)]
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pub struct Chunk {
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pub style: TextStyle,
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pub underline: bool,
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pub text: String,
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}
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#[derive(Serialize, Deserialize, Debug)]
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pub struct Line {
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pub column: Option<u32>,
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pub row: Option<u32>,
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pub chunks: Vec<Chunk>,
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/* In roll-up modes, new lines don't introduce a carriage return by
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* default, but that can be overridden */
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pub carriage_return: Option<bool>,
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}
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#[derive(Serialize, Deserialize, Debug)]
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pub struct Lines {
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pub lines: Vec<Line>,
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pub mode: Option<Cea608Mode>,
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pub clear: Option<bool>,
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}
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impl Cea608Mode {
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pub fn is_rollup(&self) -> bool {
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*self == Cea608Mode::RollUp2 || *self == Cea608Mode::RollUp3 || *self == Cea608Mode::RollUp4
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}
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}
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